CN117410951A - Lightning protection device and method for residual current circuit breaker - Google Patents
Lightning protection device and method for residual current circuit breaker Download PDFInfo
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- CN117410951A CN117410951A CN202311431240.2A CN202311431240A CN117410951A CN 117410951 A CN117410951 A CN 117410951A CN 202311431240 A CN202311431240 A CN 202311431240A CN 117410951 A CN117410951 A CN 117410951A
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- 208000025274 Lightning injury Diseases 0.000 claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 51
- 230000001012 protector Effects 0.000 claims description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 19
- 229910052710 silicon Inorganic materials 0.000 claims description 19
- 239000010703 silicon Substances 0.000 claims description 19
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 claims description 17
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- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 13
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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Abstract
The invention discloses a lightning protection device and a lightning protection method for an electric leakage circuit breaker, which relate to the field of circuit breakers and comprise an electric leakage circuit breaker module, wherein the electric leakage circuit breaker module comprises a zero sequence current transformer CT and an electromagnetic release L1, and a power supply L pole and a power supply N pole penetrate through the zero sequence current transformer CT; the lightning protection module comprises a primary lightning protection unit, the primary lightning protection unit comprises a piezoresistor RV1 and a discharge tube GGD1, two ends of the piezoresistor RV1 are connected in parallel between a power source L pole and a power source N pole, and the discharge tube GGD1 is connected in parallel between the power source N pole and a PE pole. The invention can rapidly respond to the energy of the L pole and the N pole in the lightning, and the energy of the L pole and the N pole is discharged to the ground through the grounding line; if the lightning stroke energy is too large or the lightning stroke is continuously continued, the electromagnetic release L1 can drive the operating mechanism in the residual current circuit breaker to break through the secondary lightning protection unit to cut off the main loop, so that the safety of the subsequent-stage line and load is ensured.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a lightning protection device and method for an electric leakage circuit breaker.
Background
The earth leakage breaker is a switching device capable of switching on, carrying and breaking a current under a normal loop condition and capable of carrying and breaking a current under an abnormal loop condition within a prescribed time. When the leakage current or residual current in the protected circuit reaches a designed preset action current value, a tripping mechanism in the leakage breaker enables the breaker to be rapidly opened, so that the power supply is cut off to play a role in leakage and electric shock protection.
At present, a general lightning protector or an electric leakage breaker can only realize a single lightning protection or electric leakage protection function, and some people simply combine the lightning protector and the electric leakage breaker, but cannot realize coordination.
Disclosure of Invention
In order to solve the problems, the invention provides a lightning protection device and a lightning protection method for an earth leakage breaker, wherein a two-stage lightning protection unit is arranged, so that energy of an L pole and an N pole in a lightning can be quickly responded, and the energy is discharged to the ground through a grounding line; if the lightning stroke energy is too large or the lightning stroke is continuously continued, the electromagnetic release L1 can drive the operating mechanism in the residual current circuit breaker to break through the secondary lightning protection unit to cut off the main loop, so that the safety of the subsequent-stage line and load is ensured.
The technical aim of the invention is realized by the following technical scheme:
the lightning protection device of the residual current circuit breaker is connected with the electric leakage protector and comprises a detection module and a lightning protection module connected with the detection module; the detection module comprises a zero-sequence current transformer and an electromagnetic release, wherein the power supply L pole and the power supply N pole pass through the zero-sequence current transformer, the zero-sequence current transformer is used for detecting residual current generated in a main loop, and when the residual current exceeds a threshold value, the electromagnetic release drives an operating mechanism in the residual current circuit breaker to break a gate to cut off the main loop;
the lightning protection module comprises a primary lightning protection unit and a secondary lightning protection unit, wherein the primary lightning protection unit comprises a piezoresistor RV1 and a discharge tube GGD1, and the secondary lightning protection unit comprises a piezoresistor RV2 and a discharge tube GGD2;
the two ends of the piezoresistor RV1 are connected in parallel between the power supply L pole and the power supply N pole, and the discharge tube GGD1 is connected in parallel between the power supply N pole and the PE pole; the two ends of the piezoresistor RV2 are connected in parallel between the power supply L pole and the power supply N pole, and the discharge tube GGD2 is connected in parallel between the power supply N pole and the PE pole; the electromagnetic release L1 is connected in series on the power supply N, one end of the electromagnetic release L1 is connected between the piezoresistor RV1 and the discharge tube GGD1, and the other end is connected between the piezoresistor RV2 and the discharge tube GGD2;
the piezoresistor RV1 is connected with the discharge tube GGD1 in series, and the energy of lightning strike at the L pole and the N pole can be rapidly discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
Further, the alarm module is connected with the detection module and alarms when the set temperature rise is detected to be more than 60K.
Further, in the detection module, when the input current is unequal and the current algebraic sum is outputted, the zero sequence current transformer senses the residual current, and if the residual current reaches a threshold current value, the electromagnetic release L1 drives the operating mechanism in the leakage circuit breaker to break the main loop, so that the leakage protection is realized.
Further, a resistor R2 and a test switch S1 are connected between the power supply L pole and the power supply N pole, and the resistor R2 is connected in series with the test switch S1 and then connected in parallel between the power supply L pole and the power supply N pole; when the test switch is pressed down, when the residual current generated by the zero sequence current transformer exceeds a threshold value, the electromagnetic release L1 drives an operating mechanism in the residual current circuit breaker to break off and cut off a main loop.
Further, the electric leakage switching device also comprises an electric leakage switching switch S2, wherein the electric leakage switching switch S2 is connected with the zero sequence current transformer, and when the electric leakage switching switch S2 is closed, the electric leakage function is normal; when the leakage switching switch S2 is turned off, the leakage protection function is not provided.
Further, the detection module further includes a rectifier bridge D1, a thyristor SCR1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a leakage switch S2, and a leakage protector U1;
wherein, the 1 pin of the rectifier bridge D1 is connected with one end of the piezoresistor RV2 connected with the power supply L electrode, the 3 pin of the rectifier bridge D1 is connected with one end of the piezoresistor RV2 connected with the power supply N electrode, the 2 pin of the rectifier bridge D1 is connected with one end of the positive electrode of the silicon controlled rectifier SCR1 and one end of the resistor R5, the other end of the resistor R5 is connected with one end of the capacitor C1 and 8 pins of the leakage protector U1, the 7 pin of the leakage protector U1 is connected with one end of the capacitor C7, one end of the capacitor C2 and the control end of the silicon controlled rectifier SCR1, the other end of the capacitor C7 is connected with 6 pins of the leakage protector U1, the other end of the capacitor C2, the other end of the capacitor C1 and the negative electrode of the silicon controlled rectifier SCR1 are connected with one end of the 4 pins of the rectifier bridge D1, one end of the capacitor C8, the 3 pins of the leakage protector U1, one end of the capacitor C5 and one end of the capacitor C6, the other end of electric capacity C8 is connected at earth leakage protector U1 ' S1 foot, electric capacity C6 ' S the other end is connected at earth leakage protector U1 ' S4 feet and 5 feet, electric capacity C5 ' S the other end is connected at earth leakage protector U1 ' S2 feet, resistance R4 ' S one end and electric capacity C3 ' S one end, electric capacity C3 ' S the other end is connected at earth leakage protector U1 ' S1 foot and resistance R7 ' S one end, resistance R4 ' S the other end is connected at electric capacity C4 ' S one end and resistance R3 ' S one end, the other end at zero sequence current transformer CT ' S one end is connected simultaneously to the other end of electric capacity C4 and resistance R3 ' S the other end all connect resistance R7 ' S the other end, this end is connected simultaneously at earth leakage throw the one end of back switch S2, the other end that earth leakage throw back switch S2 is connected at zero sequence current transformer CT ' S the other end.
Further, the alarm module comprises a capacitor C10, a voltage stabilizing tube D2, a diode D3, a thermistor Rt, a resistor R7, a triode Q3 and a buzzer H1;
one end of a capacitor C10 is respectively connected with the negative electrode of a voltage stabilizing tube D2, one end of a thermistor Rt and one end of a buzzer H1, the end is simultaneously connected between a resistor R5 and a resistor R6, the other end of the capacitor C10 and the positive electrode of the voltage stabilizing tube D2 are both connected with the negative electrode of a silicon controlled rectifier SCR1, the other end of the thermistor Rt is connected with the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with one end of a resistor R7 and the base electrode of a triode Q3, the collector electrode of the triode Q3 is connected with the other end of the buzzer H1, and the other end of the resistor R7 and the emitter electrode of the triode Q3 are both connected with the negative electrode of the silicon controlled rectifier SCR 1.
The invention also relates to a lightning protection method of the residual current circuit breaker, which is suitable for the device and comprises the following steps:
detecting residual current generated in the main loop, and when the residual current exceeds a threshold value, driving an operating mechanism in the residual current circuit breaker to break through an electromagnetic release L1;
the energy of lightning strike at the L pole and the N pole can be discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
Further, when the input current is unequal and the current algebraic sum is outputted, the zero sequence current transformer senses the residual current, and when the residual current reaches a threshold current value, the electromagnetic release L1 can drive an operating mechanism in the residual current circuit breaker to break to cut off a main loop, so that the leakage protection is realized.
Further, when the set temperature rise is detected to be more than 60K, the alarm module alarms.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention has the technical difficulties that the primary lightning protection and secondary lightning protection parameter design and the accurate coordination of the primary lightning protection and the linkage time of the primary control loop are realized, the components are skillfully designed and combined, and the energy of the L pole and the N pole in the rapid (ns) response lightning can be discharged to the ground through the grounding line; if the lightning stroke energy is too large or the lightning stroke is continuously continued, the electromagnetic release L1 can drive the operating mechanism in the residual current circuit breaker to break through the secondary lightning protection unit (ms) to cut off the main loop, so that the safety of a later-stage line and a load is ensured. The piezoresistor RV1 in the first-stage lightning protection unit is connected with the discharge tube GGD1 in series, and the energy of lightning strike at the L pole and the N pole can be rapidly discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
2. In the invention, the leakage switching switch S2 is arranged to switch on or off CT (when the S2 switch is off, the product has no leakage function), and only the circuit breaker function is adopted, so that the emergency electricity utilization can be realized.
3. In the invention, the alarm function is realized by arranging an alarm unit.
Drawings
Fig. 1 is a schematic structural view of an apparatus according to one embodiment of the invention.
Detailed Description
The following description of the embodiments will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments, all other embodiments that may be made by one of ordinary skill in the art without making any inventive effort are within the scope of the present application.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should be given a general meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like, as used in this embodiment, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. "upper", "lower", "left", "right", "transverse", and "vertical", etc. are used only with respect to the orientation of the components in the drawings, these directional terms are relative terms, which are used for descriptive and clarity with respect thereto and which may vary accordingly with respect to the orientation in which the components are disposed in the drawings.
As shown in fig. 1, the lightning protection function circuit of the residual current circuit breaker of this embodiment includes a detection module, the detection module includes a zero sequence current transformer CT and an electromagnetic release L1, a power supply L pole and a power supply N pole pass through the zero sequence current transformer CT, the zero sequence current transformer CT is used for detecting residual current generated in a main circuit, and when the residual current exceeds a threshold value, the electromagnetic release L1 can drive an operating mechanism in the residual current circuit breaker to break to disconnect the main circuit.
The lightning protection module comprises a primary lightning protection unit, the primary lightning protection unit comprises a piezoresistor RV1 and a discharge tube GGD1, two ends of the piezoresistor RV1 are connected between a power source L pole and a power source N pole in parallel, and the discharge tube GGD1 is connected between the power source N pole and a PE pole in parallel.
The lightning protection module further comprises a secondary lightning protection unit, the secondary lightning protection unit comprises a piezoresistor RV2 and a discharge tube GGD2, two ends of the piezoresistor RV2 are connected in parallel between a power supply L pole and a power supply N pole, and the discharge tube GGD2 is connected in parallel between the power supply N pole and a PE pole; the electromagnetic trip L1 is connected in series to the power supply N, and one end of the electromagnetic trip L1 is connected between the varistor RV1 and the discharge tube GGD1, and the other end is connected between the varistor RV2 and the discharge tube GGD 2.
The piezoresistor RV1 in the first-stage lightning protection unit is connected with the discharge tube GGD1 in series, and the energy of lightning strike at the L pole and the N pole can be rapidly discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
The leakage breaker module further comprises a rectifier bridge D1, a silicon controlled rectifier SCR1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a leakage switch S2, and a leakage protector U1, wherein the leakage protector U1 of the embodiment has a model number M54123.
The 1 foot of rectifier bridge D1 is connected at the one end that piezo-resistor RV2 and power L electrode are connected, the 3 foot of rectifier bridge D1 is connected at the one end that piezo-resistor RV2 and power N electrode are connected, the 2 foot of rectifier bridge D1 is connected at the positive electrode of silicon controlled rectifier SCR1 and one end of resistance R5, the other end of resistance R5 is connected at resistance R6 one end, the other end of resistance R6 is connected at the one end of electric capacity C1 and the 8 foot of earth leakage protector U1, the one end of earth leakage protector U1 is connected at the one end of electric capacity C7, the one end of electric capacity C2 and the control end of silicon controlled rectifier SCR1, the other end of electric capacity C7 is connected at the 6 foot of earth leakage protector U1, the other end of electric capacity C2, the other end of electric capacity C1 and the negative electrode of silicon controlled rectifier SCR1 are connected at the other end of electric capacity C1, the one end of electric capacity C4 is connected at the one end of the other end of electric capacity C1, the other end of electric capacity C8 is connected at the one end of the three-way, the other end of electric capacity C4 is connected at the three-way end of electric capacity C1 and the three-phase transformer C4, the other end of electric capacity C4 is connected at the other end of the three-phase transformer C1 is connected at the one end of the three-phase transformer C2, the three-phase transformer C1 is connected at the other end of electric capacity C2, the three-phase transformer C2 is connected at the one end of the other end of electric capacity C2, the three-phase transformer is connected at the other end, the three-phase end is connected at the one end, the three-phase end of electric capacity 3, the three-phase transformer is connected at the one end, the three-phase, and is connected at the one end.
When the input current is unequal and the current algebraic sum is output, the zero sequence current transformer CT senses the residual current, if the residual current reaches a threshold current value, the silicon controlled rectifier SCR1 is immediately conducted, and the electromagnetic release L1 can drive an operating mechanism in the leakage circuit breaker to break to cut off a main loop, so that leakage protection is realized.
It should be further noted that, when the leakage switch S2 is closed, the leakage function is normal; when the leakage switching switch S2 is turned off, the leakage protection function is not provided.
The leakage breaker module further comprises an alarm unit, wherein the alarm unit comprises a capacitor C10, a voltage stabilizing tube D2, a diode D3, a thermistor Rt, a resistor R7, a triode Q3 and a buzzer H1.
One end of a capacitor C10 is respectively connected with the negative electrode of a voltage stabilizing tube D2, one end of a thermistor Rt and one end of a buzzer H1, the end is simultaneously connected between a resistor R5 and a resistor R6, the other end of the capacitor C10 and the positive electrode of the voltage stabilizing tube D2 are both connected with the negative electrode of a silicon controlled rectifier SCR1, the other end of the thermistor Rt is connected with the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with one end of a resistor R7 and the base electrode of a triode Q3, the collector electrode of the triode Q3 is connected with the other end of the buzzer H1, and the other end of the resistor R7 and the emitter electrode of the triode Q3 are both connected with the negative electrode of the silicon controlled rectifier SCR 1.
The thermistor Rt is increased along with the temperature, the resistance value is linearly reduced, when the set temperature rise is detected to be more than 60K, the diode D3 is conducted, the triode Q3 is conducted, and the buzzer H1 alarms.
The resistor R2 and the test switch S1 are connected between the power supply L pole and the power supply N pole, and the resistor R2 and the test switch S1 are connected in series and then connected between the power supply L pole and the power supply N pole in parallel.
When the test switch S1 is pressed down, the zero sequence current transformer CT generates residual current of about 100mA, when the residual current exceeds a threshold value, the silicon controlled rectifier SCR1 is immediately conducted, and the electromagnetic release L1 can drive an operating mechanism in the residual current circuit breaker to break a main loop.
The above-described embodiments are provided for illustration only and not for limitation of the present invention, and modifications may be made to the embodiments without creative contribution by those skilled in the art after reading the present specification, as long as they are protected by patent laws within the scope of claims of the present invention.
Claims (10)
1. The utility model provides a lightning protection device of electric leakage circuit breaker which characterized in that: the lightning protection module is connected with the detection module; the detection module comprises a zero-sequence current transformer and an electromagnetic release, wherein the power supply L pole and the power supply N pole pass through the zero-sequence current transformer, the zero-sequence current transformer is used for detecting residual current generated in a main loop, and when the residual current exceeds a threshold value, the electromagnetic release drives an operating mechanism in the residual current circuit breaker to break a gate to cut off the main loop;
the lightning protection module comprises a primary lightning protection unit and a secondary lightning protection unit, wherein the primary lightning protection unit comprises a piezoresistor RV1 and a discharge tube GGD1, and the secondary lightning protection unit comprises a piezoresistor RV2 and a discharge tube GGD2;
the two ends of the piezoresistor RV1 are connected in parallel between the power supply L pole and the power supply N pole, and the discharge tube GGD1 is connected in parallel between the power supply N pole and the PE pole; the two ends of the piezoresistor RV2 are connected in parallel between the power supply L pole and the power supply N pole, and the discharge tube GGD2 is connected in parallel between the power supply N pole and the PE pole; the electromagnetic release L1 is connected in series on the power supply N, one end of the electromagnetic release L1 is connected between the piezoresistor RV1 and the discharge tube GGD1, and the other end is connected between the piezoresistor RV2 and the discharge tube GGD2;
the piezoresistor RV1 is connected with the discharge tube GGD1 in series, and the energy of lightning strike at the L pole and the N pole can be rapidly discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
2. The leakage breaker lightning protection device according to claim 1, wherein: the alarm module is connected with the detection module and alarms when the set temperature rise is detected to be more than 60K.
3. The leakage breaker lightning protection device according to claim 1, wherein: in the detection module, when the input current is unequal and the current algebraic sum is outputted, the zero sequence current transformer senses the residual current, and if the residual current reaches a threshold current value, the electromagnetic release L1 drives an operating mechanism in the leakage circuit breaker to break to cut off a main loop, so that the leakage protection is realized.
4. The leakage breaker lightning protection device according to claim 1, wherein: a resistor R2 and a test switch S1 are connected between the power supply L pole and the power supply N pole, and the resistor R2 and the test switch S1 are connected in series and then connected between the power supply L pole and the power supply N pole in parallel; when the test switch is pressed down, when the residual current generated by the zero sequence current transformer exceeds a threshold value, the electromagnetic release L1 drives an operating mechanism in the residual current circuit breaker to break off and cut off a main loop.
5. The leakage breaker lightning protection device according to claim 1, wherein: the leakage switching device also comprises a leakage switching switch S2, wherein the leakage switching switch S2 is connected with the zero sequence current transformer, and when the leakage switching switch S2 is closed, the leakage function is normal; when the leakage switching switch S2 is turned off, the leakage protection function is not provided.
6. The lightning protection device for an earth leakage breaker according to claim 2, wherein: the detection module further comprises a rectifier bridge D1, a silicon controlled rectifier SCR1, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, a leakage switch S2 and a leakage protector U1;
wherein, the 1 pin of the rectifier bridge D1 is connected with one end of the piezoresistor RV2 connected with the power supply L electrode, the 3 pin of the rectifier bridge D1 is connected with one end of the piezoresistor RV2 connected with the power supply N electrode, the 2 pin of the rectifier bridge D1 is connected with one end of the positive electrode of the silicon controlled rectifier SCR1 and one end of the resistor R5, the other end of the resistor R5 is connected with one end of the capacitor C1 and 8 pins of the leakage protector U1, the 7 pin of the leakage protector U1 is connected with one end of the capacitor C7, one end of the capacitor C2 and the control end of the silicon controlled rectifier SCR1, the other end of the capacitor C7 is connected with 6 pins of the leakage protector U1, the other end of the capacitor C2, the other end of the capacitor C1 and the negative electrode of the silicon controlled rectifier SCR1 are connected with one end of the 4 pins of the rectifier bridge D1, one end of the capacitor C8, the 3 pins of the leakage protector U1, one end of the capacitor C5 and one end of the capacitor C6, the other end of electric capacity C8 is connected at earth leakage protector U1 ' S1 foot, electric capacity C6 ' S the other end is connected at earth leakage protector U1 ' S4 feet and 5 feet, electric capacity C5 ' S the other end is connected at earth leakage protector U1 ' S2 feet, resistance R4 ' S one end and electric capacity C3 ' S one end, electric capacity C3 ' S the other end is connected at earth leakage protector U1 ' S1 foot and resistance R7 ' S one end, resistance R4 ' S the other end is connected at electric capacity C4 ' S one end and resistance R3 ' S one end, the other end at zero sequence current transformer CT ' S one end is connected simultaneously to the other end of electric capacity C4 and resistance R3 ' S the other end all connect resistance R7 ' S the other end, this end is connected simultaneously at earth leakage throw the one end of back switch S2, the other end that earth leakage throw back switch S2 is connected at zero sequence current transformer CT ' S the other end.
7. The leakage breaker lightning protection device of claim 6, wherein: the alarm module comprises a capacitor C10, a voltage stabilizing tube D2, a diode D3, a thermistor Rt, a resistor R7, a triode Q3 and a buzzer H1;
one end of a capacitor C10 is respectively connected with the negative electrode of a voltage stabilizing tube D2, one end of a thermistor Rt and one end of a buzzer H1, the end is simultaneously connected between a resistor R5 and a resistor R6, the other end of the capacitor C10 and the positive electrode of the voltage stabilizing tube D2 are both connected with the negative electrode of a silicon controlled rectifier SCR1, the other end of the thermistor Rt is connected with the positive electrode of a diode D3, the negative electrode of the diode D3 is connected with one end of a resistor R7 and the base electrode of a triode Q3, the collector electrode of the triode Q3 is connected with the other end of the buzzer H1, and the other end of the resistor R7 and the emitter electrode of the triode Q3 are both connected with the negative electrode of the silicon controlled rectifier SCR 1.
8. A lightning protection method of an electric leakage circuit breaker is characterized in that: a device adapted for use in any one of claims 1-7, comprising:
detecting residual current generated in the main loop, and when the residual current exceeds a threshold value, driving an operating mechanism in the residual current circuit breaker to break through an electromagnetic release L1;
the energy of lightning strike at the L pole and the N pole can be discharged to the ground through the grounding wire at nanosecond speed; when the energy of lightning stroke is overlarge or lightning stroke is continued, the discharge tube GGD1, the electromagnetic release L1 and the discharge tube GGD2 form m-type discharge protection, the lightning stroke discharges to the ground, and meanwhile, the main loop is disconnected by rapid switching-off, so that the safety of a later-stage line or load is protected.
9. The method according to claim 8, wherein: when the input current is unequal and the current algebraic sum is output, the zero sequence current transformer senses the residual current, and when the residual current reaches a threshold current value, the electromagnetic release L1 can drive an operating mechanism in the leakage circuit breaker to break to cut off a main loop, so that the leakage protection is realized.
10. The method according to claim 8, wherein: and when the set temperature rise is detected to be more than 60K, the alarm module alarms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311431240.2A CN117410951A (en) | 2023-10-31 | 2023-10-31 | Lightning protection device and method for residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311431240.2A CN117410951A (en) | 2023-10-31 | 2023-10-31 | Lightning protection device and method for residual current circuit breaker |
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| CN117410951A true CN117410951A (en) | 2024-01-16 |
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| CN202311431240.2A Pending CN117410951A (en) | 2023-10-31 | 2023-10-31 | Lightning protection device and method for residual current circuit breaker |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201690218U (en) * | 2010-03-10 | 2010-12-29 | 李永林 | Transformer running monitoring device |
| CN204144939U (en) * | 2014-09-12 | 2015-02-04 | 浙江久天电力科技有限公司 | A kind of lightning protection circuit |
| CN206332432U (en) * | 2016-12-28 | 2017-07-14 | 国充充电科技江苏股份有限公司 | Dc bus under-voltage protecting circuit of the low cost with isolation self-locking |
| CN219145012U (en) * | 2022-12-27 | 2023-06-06 | 浙江华航电气股份有限公司 | Lightning protection type leakage protector circuit |
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2023
- 2023-10-31 CN CN202311431240.2A patent/CN117410951A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201690218U (en) * | 2010-03-10 | 2010-12-29 | 李永林 | Transformer running monitoring device |
| CN204144939U (en) * | 2014-09-12 | 2015-02-04 | 浙江久天电力科技有限公司 | A kind of lightning protection circuit |
| CN206332432U (en) * | 2016-12-28 | 2017-07-14 | 国充充电科技江苏股份有限公司 | Dc bus under-voltage protecting circuit of the low cost with isolation self-locking |
| CN219145012U (en) * | 2022-12-27 | 2023-06-06 | 浙江华航电气股份有限公司 | Lightning protection type leakage protector circuit |
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